וַיִּשְׁלַ֤ח אֵהוּד֙ אֶת־יַ֣ד שְׂמֹאל֔וֹ וַיִּקַּח֙ אֶת־הַחֶ֔רֶב מֵעַ֖ל יֶ֣רֶךְ יְמִינ֑וֹ וַיִּתְקָעֶ֖הָ בְּבִטְנֽוֹ׃
Ahod, avançant la main gauche, saisit l’épée de dessus sa cuisse droite et la lui plongea dans le ventre.
Metzudat David on Judges
And Ehud Sent: (his sword) when he was still struggling to stand
Metzudat Zion on Judges
And it got stuck: Thrust and insertion. As in Samuel 2:18:14 "and it was thrusted in the heart of Abshalom."